| 摘要 |
PURPOSE:To improve the radio call serving by switching to other channel when a frame synchronizing signal of a radio call signal sent in multi-channel from a base station is not detected and receiving the radio call signal. CONSTITUTION:The receiver consists of an antenna 1, a high frequency amplifier 2, a mixer 3, a synthesizer 4, an intermediate frequency amplifier 5, a detector 6, a control section (CPU) 7, a read only memory(ROM) 7a, an alarm controller 8, an LCD driver 9 and a channel display device 9a. When a frame synchronizing signal of a call signal sent in multi-channel from the base station is not detected, the channel is switched to another channel to receive the call signal. Thus, the call signal of a channel having a large electric field strength is received to improve the radio call service. |
